I have a compaq computer running win xp sp2 and I'm using a usb wireless adapter I've tested it on my laptop and it won't do it on that but it will do it on my other desktop every once in a while and when it does it I just do a repair connection on it and then it works fine after that. I'm gonna try and do a re install on the software and see if it fixes it. if you have any other suggestions please let me know thanks